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Ç¥ÁعøÈ£ TTAE.IT-G.989.2 ±¸Ç¥ÁعøÈ£
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ÇѱÛÇ¥Áظí 40 ±â°¡±Þ ¼öµ¿Çü ±¤Åë½Å¸Á (NG-PON2): ¹°¸®°èÃþ ±Ô°Ý
¿µ¹®Ç¥Áظí 40-Gigabit-capable passive optical networks (NG-PON2): Physical media dependent (PMD) layer specification
Çѱ۳»¿ë¿ä¾à ITU-T G.989.2´Â ÇÏÇâ 40 Gbit/s ¹× »óÇâ 10 Gbit/sÀÇ Àü¼Û¿ë·®À» °¡Áö´Â ¼öµ¿ ±¤ ³×Æ®¿öÅ© ½Ã½ºÅÛ (NG-PON2) ÀÇ ¹°¸®°èÃþ ¿ä±¸ »çÇ×À» ±ÔÁ¤ÇÑ´Ù. NG-PON2´Â ¸ð¹ÙÀÏ ¹éȦ, ºñÁî´Ï½º ¹× °¡ÀÔÀÚ ¼­ºñ½º¿¡ ÇÊ¿äÇÑ ´ë¿ªÆø ¿ä±¸ »çÇ×À» Áö¿øÇÒ ¼ö ÀÖ´Â À¯¿¬ÇÑ ±¤ ¾×¼¼½º ³×Æ®¿öÅ©ÀÌ´Ù. ¶ÇÇÑ, G.989 Ç¥Áؽø®Áî´Â »óÇâ ¹× ÇÏÇâ ¼Óµµ¸¦ ´Ù¾çÇÏ°Ô Áö¿øÇÒ ¼ö ÀÖ´Ù. NG-PON2 ÆÄÀå Ç÷£Àº (ITU G.989.1] ÂüÁ¶) ·¹°Å½Ã PON ½Ã½ºÅÛ°ú ±¤ÆÄÀå ¿À¹ö·¹À̸¦ ÅëÇØ »óÈ£°øÁ¸ÀÌ °¡´ÉÇϵµ·Ï Á¤ÀǵǾî ÀÖ´Ù. Àü¼Û¼ö·Å(TC) °èÃþ Ç¥ÁØ (G.989.3)Àº ITU-T G.987.3À» ±â¹ÝÀ¸·Î ±¸¼ºµÇ¸ç, NG-PON2¸¦ À§ÇØ º¯°æµÈ ºÎºÐÀÌ Ãß°¡µÇ¾ú´Ù. NG-PON2ÀÇ È®ÀåÀ» À§ÇÑ ONU °ü¸® ¹× Á¦¾î ÀÎÅÍÆäÀ̽º (OMCI) ±Ô°ÝÀº Ç¥ÁØ ITU-T G.988¿¡ ±âÀçµÇ¾î ÀÖ´Ù.
º» Ç¥ÁØÀº ½Ã°£°ú ´ÙÁßÈ­µÈ ÆÄÀå ä³ÎÀÇ Æ¯¼ºÀ» °¡Áø ÇÏÀ̺긮µå PON (TWDM-PON)À» ±ÔÁ¤Çϸç, ¼±ÅÃÀûÀ¸·Î ÆÄÀå°¡º¯ PtP WDM PONµµ ±â¼úÇÑ´Ù. º» Ç¥ÁØ¿¡¼­ ¼³¸íµÇ´Â TWDM-PONÀº ITU-T G.984 ¹× G.987 ½Ã¸®Áî¿¡ ±âÀçµÈ ½Ã½ºÅÛÀÌ ¹ßÀüµÈ °ÍÀÌ´Ù. º» Ç¥ÁØÀº ±âÁ¸ ±â¼ú ¹× ÀÌ¹Ì Æ÷¼³µÈ ±¤°¡ÀÔÀÚ ½Ã½ºÅÛ°ú ±¤ÀÎÇÁ¶ó¸¦ ÃÖ´ëÇÑ À¯ÁöÇÒ ¼ö ÀÖµµ·Ï ITU-T G.984.1°ú G.987.1ÀÇ ¿ä±¸ »çÇ×À» À¯ÁöÇÏ¿´´Ù.
¿µ¹®³»¿ë¿ä¾à Recommendation ITU-T G.989.2 specifies the physical media dependent (PMD) layer re-quirements for a passive optical network system with a nominal aggregate capacity of 40 Gbit/s in the downstream direction and 10Gbit/s in the upstream direction, hereinafter re-ferred to as NG-PON2. NG-PON2 is a flexible optical fibre access network capable of sup-porting the bandwidth requirements of mobile backhaul, business and residential services. Furthermore, this recommendation describes optional configurations to extend beyond this nominal capacity as the G.989 series of standards allows for multiple upstream and down-stream line rates.
NG-PON2 wavelength plan is defined to enable the coexistence through wavelength over-lay with legacy PON systems (see [ITU G.989.1]). The transmission convergence (TC) layer is based on Recommendation ITU-T G.987.3, with unique modifications for NG-PON2 cap-tured in Recommendation ITU-T G.989.3. The ONU management and control interface (OMCI) specifications are described in Recommendation ITU-T G.988 for NG-PON2 extensions.
This recommendation specifies the characteristics of hybrid time and wavelength multi-plexed channels, hereinafter referred to as TWDM PON. The characteristics of, optional, tunable point-to-point wavelength overlay channels are also described, hereinafter referred to as PtP WDM PON.
The TWDM PON described in this Recommendation represents a further development from the systems described in the ITU-T G.984 and G.987 series. To the greatest extent possible, this Recommendation retains the requirements of ITU-T G.984.1 and G.987.1 to ensure maximal reuse of existing technology and compatibility with deployed optical access sys-tems and optical fibre infrastructure.
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°ü·ÃÆÄÀÏ TTAE.IT-G.989.2.pdf TTAE.IT-G.989.2.pdf            

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